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Publicação
Correlations between disease severity, glucosinolate profiles and total phenolics and Xanthomonas campestris pv. campestris inoculation of different Brassicaceae
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Orientador(es)
Resumo(s)
Many Brassicaceae species are economically important crops and Xanthomonas campestris pv. campestris
(Xcc), the causal agent of black rot, is considered one of the most important necrotrophic plant bacterial
diseases occurring worldwide on these and many other crops. Therefore identifying resistance
mechanisms and genes is crucial. Researchers continue to investigate the role of phytochemicals (plant
secondary metabolites) in protecting plants against diseases and pathogens. Glucosinolates (GLS), and
more specifically their hydrolysis products, are known to have various biological effects including
antimicrobial activity. From the positive results of initial in vitro studies with Xcc and other pathogenic
bacteria new experiments were designed to evaluate the possible in planta role of GLS, and also phenolics,
in the interaction with Xcc. The in planta studies, with various Brassicaceae seedlings, have
shown a correlation between GLS profiles, and therefore the subsequent hydrolysis products, and
the inhibition of Xcc growth. There were no significant correlations between Xcc infection and total
phenolics. Positive correlations were found between specific and total GLS contents and the severity
of disease. Further in vitro and in planta studies need to be performed to evaluate the role of
GLS and other defense mechanisms in Xcc and other important bacterial infections of Brassicaceae
crops.
Descrição
Palavras-chave
vegetable Brassica plant pathogenic bacteria phytochemicals isothiocynates
Contexto Educativo
Citação
"Scientia Horticulturae". ISSN 0304-4238. 129 (2011) 503-510